U.S. patent application number 15/503054 was filed with the patent office on 2017-09-28 for display driving method for a display panel, display driving circuit and display device.
The applicant listed for this patent is BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Boe Technology Group Co., Ltd.. Invention is credited to Dan Su.
Application Number | 20170278470 15/503054 |
Document ID | / |
Family ID | 54801881 |
Filed Date | 2017-09-28 |
United States Patent
Application |
20170278470 |
Kind Code |
A1 |
Su; Dan |
September 28, 2017 |
DISPLAY DRIVING METHOD FOR A DISPLAY PANEL, DISPLAY DRIVING CIRCUIT
AND DISPLAY DEVICE
Abstract
The present disclosure provides a display driving method for a
display panel, comprising: calculating a difference value of
display data; converting difference values as well as display data
of rows in the display image of the current frame for which
difference values are not calculated into gray scale voltages;
increasing or decreasing a gray scale voltage corresponding to the
difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line; and outputting a gray scale voltage
corresponding to the display data of the row in the display image
of the current frame for which the difference value is not
calculated to a respective data line. The present disclosure
further provides a display driving circuit and a display
device.
Inventors: |
Su; Dan; (Beijing,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Boe Technology Group Co., Ltd.
BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD. |
Beijin
Beijin |
|
CN
CN |
|
|
Family ID: |
54801881 |
Appl. No.: |
15/503054 |
Filed: |
August 17, 2016 |
PCT Filed: |
August 17, 2016 |
PCT NO: |
PCT/CN2016/095685 |
371 Date: |
February 10, 2017 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04N 3/127 20130101;
G09G 3/003 20130101; G09G 2340/16 20130101; G09G 5/006 20130101;
G09G 3/36 20130101; G09G 2360/16 20130101; G09G 3/2011 20130101;
G09G 3/20 20130101; G09G 3/3614 20130101; G09G 2320/0276 20130101;
G09G 3/3696 20130101 |
International
Class: |
G09G 3/36 20060101
G09G003/36; G09G 3/20 20060101 G09G003/20; H04N 3/12 20060101
H04N003/12; G09G 5/00 20060101 G09G005/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 26, 2015 |
CN |
201510702813.X |
Claims
1. A display driving method for driving a display panel,
comprising: calculating a difference value of display data of at
least one row in a display image of a current frame relative to
display data of a corresponding row in a display image of a
previous frame; converting difference values that are larger than
zero and smaller than zero in the calculated difference values, as
well as display data of rows in the display image of the current
frame for which difference values are not calculated into gray
scale voltages; when a gate scanning signal is loaded onto a gate
line electrically connected with a pixel unit corresponding to a
row in the display image of the current frame for which a
difference value is calculated, increasing or decreasing a gray
scale voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line; and when a gate
scanning signal is loaded onto a gate line electrically connected
with a pixel unit corresponding to a row in the display image of
the current frame for which the difference value is not calculated,
outputting a gray scale voltage corresponding to the display data
of the row in the display image of the current frame for which the
difference value is not calculated to a respective data line.
2. The display driving method as claimed in claim 1, wherein
calculating a difference value of display data of at least one row
in a display image of a current frame relative to display data of a
corresponding row in a display image of a previous frame comprises:
calculating a difference value of display data of at least one row
in a display image of a current frame relative to display data of a
corresponding row in a display image of a previous frame using a
binary system.
3. The display driving method as claimed in claim 1, wherein
loading a gate scanning signal onto a gate line electrically
connected with a pixel unit corresponding to each row in the
display image of the current frame comprises: loading a gate
scanning signal onto the gate line twice successively.
4. The display driving method as claimed in claim 1, wherein
increasing or decreasing a gray scale voltage corresponding to the
difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line comprise: increasing or decreasing a gray
scale voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal, a latch input signal and a
difference polarity input signal.
5. The display driving method as claimed in claim 4, wherein
increasing or decreasing a gray scale voltage corresponding to the
difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line under control of a polarity reversal input
signal, a latch input signal and a difference polarity input signal
comprises: when the calculated difference value is larger than
zero, a polarity of the difference polarity input signal being
positive, increasing a gray scale voltage corresponding to the
difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line under control of a polarity reversal input
signal and a latch input signal; and when the calculated difference
value is smaller than zero, a polraity of the difference polarity
input signal being negative, decreasing a gray scale voltage
corresponding to the difference value on a gray scale voltage
corresponding to the display data of a corresponding row in the
display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal and a latch input signal.
6. A display driving circuit of a display panel, comprising: a
timing control circuit, a gate driving circuit and a source driving
circuit; wherein, the timing control circuit is used for
calculating a difference value of display data of at least one row
in a display image of a current frame relative to display data of a
corresponding row in a display image of a previous frame; the gate
driving circuit is used for loading a gate scanning signal onto
each gate line; and the source driving circuit is used for
converting difference values that are larger than zero and smaller
than zero in the calculated difference values, as well as display
data of rows in the display image of the current frame for which
difference values are not calculated into gray scale voltages,
wherein when a gate scanning signal is loaded onto a gate line
electrically connected with a pixel unit corresponding to a row in
the display image of the current frame for which a difference value
is calculated, increasing or decreasing a gray scale voltage
corresponding to the difference value on a gray scale voltage
corresponding to the display data of a corresponding row in the
display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line; and when a gate
scanning signal is loaded onto a gate line electrically connected
with a pixel unit corresponding to a row in the display image of
the current frame for which the difference value is not calculated,
outputting a gray scale voltage corresponding to the display data
of the row in the display image of the current frame for which the
difference value is not calculated to a respective data line.
7. The display driving circuit as claimed in claim 6, wherein the
timing control circuit is used for calculating a difference value
of display data of at least one row in a display image of a current
frame relative to display data of a corresponding row in a display
image of a previous frame using a binary system.
8. The display driving circuit as claimed in claim 6, wherein the
gate driving circuit is used for loading a gate scanning signal
onto a gate line electrically connected with a pixel unit
corresponding to each row in the display image of the current frame
twice successively.
9. The display driving circuit as claimed in claim 6, wherein the
source driving circuit is used for increasing or decreasing a gray
scale voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal, a latch input signal and a
difference polarity input signal.
10. The display driving circuit as claimed in claim 9, wherein the
source driving circuit is used for: when the calculated difference
value is larger than zero, a polarity of the difference polarity
input signal being positive, increasing a gray scale voltage
corresponding to the difference value on a gray scale voltage
corresponding to the display data of a corresponding row in the
display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal and a latch input signal; and when
the calculated difference value is smaller than zero, a polarity of
the difference polarity input signal being negative, decreasing a
gray scale voltage corresponding to the difference value on a gray
scale voltage corresponding to the display data of a corresponding
row in the display image of the previous frame and outputting the
obtained gray scale voltage to a respective data line under control
of a polarity reversal input signal and a latch input signal.
11. A display device, comprising: a display driving circuit as
claimed in claim 6.
12. The display device as claimed in claim 11, wherein the timing
control circuit is used for calculating a difference value of
display data of at least one row in a display image of a current
frame relative to display data of a corresponding row in a display
image of a previous frame using a binary system.
13. The display device as claimed in claim 11, wherein the gate
driving circuit is used for loading a gate scanning signal onto a
gate line electrically connected with a pixel unit corresponding to
each row in the display image of the current frame twice
successively.
14. The display device as claimed in claim 11, wherein the source
driving circuit is used for increasing or decreasing a gray scale
voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal, a latch input signal and a
difference polarity input signal.
15. The display device as claimed in claim 14, wherein the source
driving circuit is used for: when the calculated difference value
is larger than zero, a polarity of the difference polarity input
signal being positive, increasing a gray scale voltage
corresponding to the difference value on a gray scale voltage
corresponding to the display data of a corresponding row in the
display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal and a latch input signal; and when
the calculated difference value is smaller than zero, a polarity of
the difference polarity input signal being negative, decreasing a
gray scale voltage corresponding to the difference value on a gray
scale voltage corresponding to the display data of a corresponding
row in the display image of the previous frame and outputting the
obtained gray scale voltage to a respective data line under control
of a polarity reversal input signal and a latch input signal.
Description
[0001] The present application is the U.S. national phase entry of
PCT/CN2016/095685, with an international filing date of Aug. 17,
2016, which claims the benefit of Chinese Patent Application No.
201510702813.X, filed on Oct. 26, 2015, the entire disclosure of
which is incorporated herein by reference.
TECHNICAL FIELD
[0002] The present disclosure relates to the field of display
technology, particularly to a display driving method for a display
panel, a display driving circuit and a display device.
BACKGROUND
[0003] In the existing display panels, the organic light emitting
diode (OLED) display panel has advantages of simple manufacturing
process, low cost, high light emitting efficiency and an easily
formable flexible structure. The liquid crystal display panel (LCD)
has advantages of low power consumption, high display quality, free
of electromagnetic radiation and wide application scope. The
organic light emitting diode display panel and the liquid crystal
display panel are both important display panels at present.
[0004] In the process of displaying images (for example, text
editing of images) by the existing display panel, the area of the
region where the whole display image changes is very small.
However, the driving circuit still performs analysis, conversion
and transmission on the display data in the display image of each
frame. That is to say, the driving circuit performs a large amount
of repetitive work. This causes the display panel to consume a
relatively high amount of power.
SUMMARY
[0005] In view of this, embodiments of the present disclosure
provide a display driving method for a display panel, a display
driving circuit and a display device, for reducing power
consumption of the display panel.
[0006] According to an aspect of the present disclosure, a display
driving method for a display panel is provided, comprising:
[0007] calculating a difference value of display data of at least
one row in a display image of a current frame relative to display
data of a corresponding row in a display image of a previous
frame;
[0008] converting difference values that are larger than zero and
smaller than to zero in the calculated difference values, as well
as display data of rows in the display image of the current frame
for which difference values are not calculated into gray scale
voltages;
[0009] when a gate scanning signal is loaded onto a gate line
electrically connected with a pixel unit corresponding to a row in
the display image of the current frame for which a difference value
is calculated, increasing or decreasing a gray scale voltage
corresponding to the difference value on a gray scale voltage
corresponding to the display data of a corresponding row in the
display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line;
[0010] when a gate scanning signal is loaded onto a gate line
electrically connected with a pixel unit corresponding to a row in
the display image of the current frame for which the difference
value is not calculated, outputting a gray scale voltage
corresponding to the display data of the row in the display image
of the current frame for which the difference value is not
calculated to a respective data line.
[0011] In one embodiment, calculating a difference value of display
data of at least one row in a display image of a current frame
relative to display data of a corresponding row in a display image
of a previous frame comprises:
[0012] calculating a difference value of display data of at least
one row in a display image of a current frame relative to display
data of a corresponding row in a display image of a previous frame
using a binary system.
[0013] In one embodiment, loading a gate scanning signal onto a
gate line electrically connected with a pixel unit corresponding to
each row in the display image of the current frame comprises:
[0014] loading a gate scanning signal onto the gate line twice
successively.
[0015] In one embodiment, increasing or decreasing a gray scale
voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line comprise:
[0016] increasing or decreasing a gray scale voltage corresponding
to the difference value on a gray scale voltage corresponding to
the display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line under control of a polarity reversal input
signal, a latch input signal and a difference polarity input
signal.
[0017] In one embodiment, increasing or decreasing a gray scale
voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal, a latch input signal and a
difference polarity input signal comprises:
[0018] when the calculated difference value is larger than zero, a
polarity of the difference polarity input signal being positive,
increasing a gray scale voltage corresponding to the difference
value on a gray scale voltage corresponding to the display data of
a corresponding row in the display image of the previous frame and
outputting the obtained gray scale voltage to a respective data
line under control of a polarity reversal input signal and a latch
input signal;
[0019] when the calculated difference value is smaller than zero, a
polraity of the difference polarity input signal being negative,
decreasing a gray scale voltage corresponding to the difference
value on a gray scale voltage corresponding to the display data of
a corresponding row in the display image of the previous frame and
outputting the obtained gray scale voltage to a respective data
line under control of a polarity reversal input signal and a latch
input signal.
[0020] According to another aspect of the present disclosure, a
display driving circuit of a display panel is provided, comprising:
a timing control circuit, a gate driving circuit and a source
driving circuit.
[0021] The timing control circuit is used for calculating a
difference value of display data of at least one row in a display
image of a current frame relative to display data of a
corresponding row in a display image of a previous frame.
[0022] The gate driving circuit is used for loading a gate scanning
signal onto each gate line.
[0023] The source driving circuit is used for converting difference
values that are larger than zero and smaller than zero in the
calculated difference values, as well as display data of rows in
the display image of the current frame for which difference values
are not calculated into gray scale voltages; when a gate scanning
signal is loaded onto a gate line electrically connected with a
pixel unit corresponding to a row in the display image of the
current frame for which a difference value is calculated,
increasing or decreasing a gray scale voltage corresponding to the
difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line; when a gate scanning signal is loaded onto a
gate line electrically connected with a pixel unit corresponding to
a row in the display image of the current frame for which the
difference value is not calculated, outputting a gray scale voltage
corresponding to the display data of the row in the display image
of the current frame for which the difference value is not
calculated to a respective data line.
[0024] In one embodiment, the timing control circuit is used for
calculating a difference value of display data of at least one row
in a display image of a current frame relative to display data of a
corresponding row in a display image of a previous frame using a
binary system.
[0025] In one embodiment, the gate driving circuit is used for
loading a gate scanning signal onto a gate line electrically
connected with a pixel unit corresponding to each row in the
display image of the current frame twice successively.
[0026] In one embodiment, the source driving circuit is used for
increasing or decreasing a gray scale voltage corresponding to the
difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line under control of a polarity reversal input
signal, a latch input signal and a difference polarity input
signal.
[0027] In one embodiment, the source driving circuit is used for:
when the calculated difference value is larger than zero, a
polarity of the difference polarity input signal being positive,
increasing a gray scale voltage corresponding to the difference
value on a gray scale voltage corresponding to the display data of
a corresponding row in the display image of the previous frame and
outputting the obtained gray scale voltage to a respective data
line under control of a polarity reversal input signal and a latch
input signal; when the calculated difference value is smaller than
zero, a polarity of the difference polarity input signal being
negative, decreasing a gray scale voltage corresponding to the
difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line under control of a polarity reversal input
signal and a latch input signal.
[0028] According to another aspect of the present disclosure, a
display device is provided, comprising: a display driving circuit
provided by any of the above embodiments.
[0029] In the display driving method for a display panel provided
by embodiments of the present disclosure, a difference value of
display data of at least one row in a display image of a current
frame relative to display data of a corresponding row in a display
image of a previous frame is calculated. When digital to analog
conversion is performed, for rows in the display image of the
current frame for which difference values are calculated relative
to the display data of the corresponding rows in the display image
of the previous frame, the digital to analog conversion is only
performed on difference values that are larger than zero and
smaller than zero in the calculated difference values. When a gate
scanning signal is loaded onto a gate line electrically connected
with a pixel unit corresponding to the row, a gray scale voltage
corresponding to the difference value is increased or decreased on
a gray scale voltage corresponding to the display data of a
corresponding row in the display image of the previous frame and
the obtained gray scale voltage is outputted to a respective data
line. In this way, in the event that the display images of two
adjacent frames are substantially not changed, repeated digital to
analog conversion can be avoided, thereby reducing power
consumption of the display panel.
BRIEF DESCRIPTION OF THE DRAWINGS
[0030] FIGS. 1-3 are flow charts of a display driving method for a
display panel provided by embodiments of the present disclosure
respectively;
[0031] FIG. 4 is a timing diagram of a display driving method for a
display panel provided by embodiments of the present disclosure;
and
[0032] FIG. 5 is a schematic view of a display driving circuit of a
display panel provided by embodiments of the present
disclosure.
DETAILED DESCRIPTION
[0033] Next, specific implementations of the display driving method
for a display panel, the display driving circuit and the display
device provided by embodiments of the present disclosure will be
explained in detailed with reference to the drawings.
[0034] A display driving method for a display panel provided by
embodiments of the present disclosure, as shown in FIG. 1,
comprises the following steps.
[0035] S101, calculating a difference value of display data of at
least one row in a display image of a current frame relative to
display data of a corresponding row in a display image of a
previous frame. The display image of the current frame does not
comprise the display image of the first frame. For example,
difference values of display data of rows in the display image of
the second frame relative to display data of corresponding rows in
the display image of the first frame are calculated.
[0036] S102, converting difference values that are larger than zero
and smaller than zero in the calculated difference values, as well
as display data of rows in the display image of the current frame
for which difference values are not calculated into gray scale
voltages. For example, the display data of rows in the display
image of the first frame and the difference values that are larger
than zero and smaller than zero of the display data of rows in the
display image of the second frame relative to the display data of
corresponding rows in the display image of the first frame are
converted into gray scale voltages.
[0037] When a gate scanning signal is loaded onto a gate line
electrically connected with a pixel unit corresponding to a row in
the display image of the current frame for which a difference value
is calculated, step S103 is performed. When a gate scanning signal
is loaded onto a gate line electrically connected with a pixel unit
corresponding to a row in the display image of the current frame
for which a difference value is not calculated, step S104 is
performed.
[0038] S103, increasing or decreasing a gray scale voltage
corresponding to the difference value on a gray scale voltage
corresponding to the display data of a corresponding row in the
display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line. For example, within
the time period of display of the second frame, when a gate
scanning signal is loaded onto a respective gate line, a gray scale
voltage corresponding to the difference value is increased or
decreased on the gray scale voltage corresponding to the display
data of a respective row in the display image of the first frame,
and the obtained gray scale voltage is outputted to a respective
data line.
[0039] S104, outputting a gray scale voltage corresponding to the
display data of the row in the display image of the current frame
for which the difference value is not calculated to a respective
data line. For example, within the time period of display of the
first frame, when a gate scanning signal is loaded onto a
respective gate line, the gray scale voltage corresponding to the
display data of a respective row in the display image of the first
frame is outputted to a respective data line.
[0040] In the display driving method for a display panel provided
by embodiments of the present disclosure, a difference value of
display data of at least one row in a display image of a current
frame relative to display data of a corresponding row in a display
image of a previous frame is calculated. When digital to analog
conversion is performed, for rows in the display image of the
current frame for which difference values are calculated relative
to the display data of the corresponding rows in the display image
of the previous frame, the digital to analog conversion is only
performed on difference values that are larger than zero and
smaller than zero in the calculated difference values. When a gate
scanning signal is loaded onto a gate line electrically connected
with a pixel unit corresponding to the row, a gray scale voltage
corresponding to the difference value is increased or decreased on
a gray scale voltage corresponding to the display data of a
corresponding row in the display image of the previous frame and
the obtained gray scale voltage is outputted to a respective data
line. In this way, in the event that the display images of two
adjacent frames are substantially not changed, repeated digital to
analog conversion can be avoided, thereby reducing power
consumption of the display panel.
[0041] When the step S101, calculating a difference value of
display data of at least one row in a display image of a current
frame relative to display data of a corresponding row in a display
image of a previous frame, in the display driving method provided
by embodiments of the present disclosure is performed, as shown in
FIG. 2, it can be implemented specifically in the following
way.
[0042] S201, calculating a difference value of display data of at
least one row in a display image of a current frame relative to
display data of a corresponding row in a display image of a
previous frame using a binary system. For example, take the 6 bit
display driving manner as an example. Specifically, the display
data of the first row in the display image of the first frame is
10101, and the display data of the first row in the display image
of the second frame is 101101. In this case, the difference value
of the display data of the first row in the display image of the
second frame relative to the display data of the first row in the
display image of the first frame is 000011.
[0043] In specific implementations, the display driving method
provided by embodiments of the present disclosure is particularly
suitable for splitting one frame of display image into two frames
of display image that can be seen by the left eye and the right
eye, so as to realize 3D display. When a gate scanning signal is
loaded onto a gate line electrically connected with a pixel unit
corresponding to each row in the display image of the current
frame, the gate scanning signal can be loaded onto the gate line
twice successively.
[0044] For example, in the process of loading gate scanning signals
onto respective gate lines Gate1, Gate2, Gate3 . . . , firstly, two
pulse signals are loaded onto the gate line Gate1, then two pulse
signals are loaded onto the gate lines Gate2, and so on. After the
respective gate lines Gate1, Gate2, Gate3 . . . are scanned, one
frame of display image displayed by loading a first pulse signal
onto respective gate line Gate1, Gate2, Gate3 . . . is seen by the
left eye of a person, and one frame of display image displayed by
loading a second pulse signal onto respective gate line Gate1,
Gate2, Gate3 . . . is seen by the right eye of the person.
[0045] Certainly, the display driving method provided by
embodiments of the present disclosure can also be suitable for 2D
display. That is, when a gate scanning signal is loaded onto a gate
line electrically connected with a pixel unit corresponding to each
row in the display image of the current frame, a gate scanning
signal is loaded onto the gate line once. For example, in the
process of loading gate scanning signals onto respective gate lines
Gate1, Gate2, Gate3 . . . , firstly, one pulse signal is loaded to
the gate line Gate1, then one pulse signal is loaded onto the gate
line Gate2, and so on. After the respective gate lines Gate1,
Gate2, Gate3 . . . are scanned, the image displayed by loading
pulse signals onto respective gate lines Gate1, Gate2, Gate3 . . .
is a display image of one frame.
[0046] When the step S103, increasing or decreasing a gray scale
voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line, in the display
driving method provided by embodiments of the present disclosure is
performed, as shown in FIG. 2, it can be implemented specifically
in the following way.
[0047] S203, increasing or decreasing a gray scale voltage
corresponding to the difference value on a gray scale voltage
corresponding to the display data of a corresponding row in the
display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal, a latch input signal and a
difference polarity input signal. The polarity of the difference
polarity input signal depends on the polarity of the difference
value. Specifically, when the difference value is positive, the
polarity of the difference polarity input signal is positive, and a
high level is outputted. Alternatively, when the difference value
is negative, the polarity of the difference polarity input signal
is negative, and a low level is outputted. For example, take the 6
bit display driving manner as an example. Specifically, the display
data of the first row in the display image of the first frame is
101010, and the display data of the first row in the display image
of the second frame is 101101. In this case, the difference value
of the display data of the first row in the display image of the
second frame relative to the display data of the first row in the
display image of the first frame is 000011. This difference value
is positive.
[0048] When the step 203, increasing or decreasing a gray scale
voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal, a latch input signal and a
difference polarity input signal, in the display driving method
provided by embodiments of the present disclosure is performed, as
shown in FIG. 3, it can specifically comprise the following steps.
That is, performing step S301 when the calculated difference value
is larger than zero; and performing step S302 when the calculated
difference value is smaller than zero.
[0049] S301, with a polarity of the difference polarity input
signal positive, increasing a gray scale voltage corresponding to
the difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line under control of a polarity reversal input
signal and a latch input signal.
[0050] S302, with a polarity of the difference polarity input
signal negative, decreasing a gray scale voltage corresponding to
the difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line under control of a polarity reversal input
signal and a latch input signal.
[0051] Specifically, in the driving timing diagram as shown in FIG.
4, two frames of display image seen by the left eye and the right
eye are shown. Next, driving processes for the display image of the
first frame and the display image of the second frame will be
explained for example. Difference values of the display data of
respective rows in the display image of the second frame relative
to the display data of corresponding rows in the display image of
the first frame are calculated. The display data of respective rows
in the display image of the first frame and the difference values
that are larger than zero and smaller than zero in the claculated
difference values are converted into gray scale voltages. In the
time period of display of the first frame, gate scanning signals
are loaded onto respective gate lines Gate1, Gate2, Gate3 . . .
under the control of the timing control signals CPV and OE1. The
gray scale voltages corresponding to the display data of respective
rows in the display image of the first frame are outputted to
respective data lines under the control of the polarity reversal
input signal POL and the latch input signal TP. In the time period
of display of the second frame, gate scanning signals are loaded
onto respective gate lines Gate1, Gate2, Gate3 . . . under the
control of the timing control signals CPV and OE1. The gray scale
voltages corresponding to the difference values are increased on
the gray scale voltages corresponding to the display data of
respective rows in the display image of the first frame and the
obtained gray scale voltages are outputted to respective data lines
under the control of the polarity reversal input signal POL, the
latch input signal TP and the difference polarity input signal POLT
(as shown in FIG. 4, when the gate line Gate2 is scanned, the
difference value is positive, and the polarity of the POLT is
positive). Alternatively, the gray scale voltages corresponding to
the difference values are decreased on the gray scale voltages
corresponding to the display data of respective rows in the display
image of the first frame and the obtained gray scale voltages are
outputted to respective data lines under the control of the
polarity reversal input signal POL, the latch input signal TP and
the difference polarity input signal POLT (as shown in FIG. 4, when
the gate lines Gate1, Gate3 are scanned, the difference value is
negative, and the polarity of the POLT is negative).
[0052] Based on the same inventive concept, embodiments of the
present disclosure further provides a display driving circuit of a
display panel. As shown in FIG. 5, The display driving circuit may
comprise: a timing control circuit 501, a gate driving circuit 502
and a source driving circuit 503.
[0053] The timing control circuit 501 is used for calculating a
difference value of display data of at least one row in a display
image of a current frame relative to display data of a
corresponding row in a display image of a previous frame. The
display image of the current frame does not comprise the display
image of the first frame. For example, difference values of the
display data of respective rows in the display image of the second
frame relative to the display data of corresponding rows in the
display image of the first frame are calculated.
[0054] The gate driving circuit 502 is used for loading a gate
scanning signal onto each gate line.
[0055] The source driving circuit 503 is used for converting
difference values that are larger than zero and smaller than zero
in the calculated difference values, as well as display data of
rows in the display image of the current frame for which difference
values are not calculated into gray scale voltages. When a gate
scanning signal is loaded onto a gate line electrically connected
with a pixel unit corresponding to a row in the display image of
the current frame for which a difference value is calculated, a
gray scale voltage corresponding to the difference value is
increased or decreased on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and the obtained gray scale voltage is outputted to
a respective data line. When a gate scanning signal is loaded onto
a gate line electrically connected with a pixel unit corresponding
to a row in the display image of the curent frame that for which
difference value is not calculated, a gray scale voltage
corresponding to the display data of the row in the display image
of the current frame for which the difference value is not
calculated is outputted to a respective data line.
[0056] The timing control circuit 501 can be used for calculating a
difference value of display data of at least one row in a display
image of a current frame relative to display data of a
corresponding row in a display image of a previous frame using a
binary system. For example, take the 6 bit display driving manner
as an example. Specifically, the display data of the first row in
the display image of the first frame is 101010, and the display
data of the first row in the display image of the second frame is
101101. In this case, the difference value of the display data
101101 of the first row in the display image of the second frame
relative to the display data 101010 of the first row in the display
image of the first frame calculated by the timing control circuit
501 is 000011.
[0057] In specific implementations, the display driving circuit
provided by embodiments of the present disclosure is particularly
suitable for splitting one frame of display image into two frames
of display image that can be seen by the left eye and the right
eye, so as to realize 3D display. In the display driving circuit
provided by embodiments of the present disclosure, the gate driving
circuit 502 can be used for loading a gate scanning signal onto a
gate line electrically connected with a pixel unit corresponding to
each row in the display image of the current frame twice
successively. For example, in the process of loading gate scanning
signals onto respective gate lines Gate1, Gate2, Gate3 . . . by the
gate driving circuit 502, firstly, the gate driving circuit 502
loads two pulse signals onto the gate line Gate1, then the gate
driving circuit 502 loads two pulse signals onto the gate lines
Gate2, and so on. After the gate driving circuit 502 scans the
respective gate lines Gate1, Gate2, Gate3 . . . , one frame of
display image displayed by loading a first pulse signal onto
respective gate line Gate1, Gate2, Gate3 . . . by the gate driving
circuit 502 is seen by the left eye of a person, and one frame of
display image displayed by loading a second pulse signal onto
respective gate line Gate1, Gate2, Gate3 . . . by the gate driving
circuit 502 is seen by the right eye of the person.
[0058] Certainly, the display driving circuit provided by
embodiments of the present disclosure can also be suitable for 2D
display. That is, when the gate driving circuit 502 loads a gate
scanning signal onto a gate line electrically connected with a
pixel unit corresponding to each row in the display image of the
current frame, the gate driving circuit 502 loads a gate scanning
signal onto the gate line once. For example, in the process of
loading gate scanning signals onto respective gate lines Gate1,
Gate2, Gate3 . . . by the gate driving circuit 502, firstly, the
gate driving circuit 502 loads one pulse signal onto the gate line
Gate1, then the gate driving circuit 502 loads one pulse signal
onto the gate line Gate2, and so on. After the respective gate
lines Gate1, Gate2, Gate3 . . . are scanned, the image displayed by
loading pulse signals onto respective gate lines Gate1, Gate2,
Gate3 . . . is a display image of one frame.
[0059] The source driving circuit 503 can be used for increasing or
decreasing a gray scale voltage corresponding to the difference
value on a gray scale voltage corresponding to the display data of
a corresponding row in the display image of the previous frame and
outputting the obtained gray scale voltage to a respective data
line under control of a polarity reversal input signal, a latch
input signal and a difference polarity input signal. The polarity
of the difference polarity input signal depends on the polarity of
the difference value. Specifically, when the difference value is
positive, the polarity of the difference polarity input signal is
positive, and a high level is outputted. Alternatively, when the
difference value is negative, the polarity of the difference
polarity input signal is negative, and a low level is outputted.
For example, take the 6 bit display driving manner as an example.
Specifically, the display data of the first row in the display
image of the first frame is 101010, and the display data of the
first row in the display image of the second frame is 101101. In
this case, the difference value of the display data of the first
row in the display image of the second frame relative to the
display data of the first row in the display image of the first
frame is 000011. This difference value is positive.
[0060] The source driving circuit 503 can be used for: when the
calculated difference value is larger than zero, a polarity of the
difference polarity input signal being positive, increasing a gray
scale voltage corresponding to the difference value on a gray scale
voltage corresponding to the display data of a corresponding row in
the display image of the previous frame and outputting the obtained
gray scale voltage to a respective data line under control of a
polarity reversal input signal and a latch input signal.
Alternatively, when the calculated difference value is smaller than
zero, a polarity of the difference polarity input signal being
negative, decreasing a gray scale voltage corresponding to the
difference value on a gray scale voltage corresponding to the
display data of a corresponding row in the display image of the
previous frame and outputting the obtained gray scale voltage to a
respective data line under control of a polarity reversal input
signal and a latch input signal.
[0061] It should be noted that implementations of the display
driving circuit provided by embodiments of the present disclosure
can make reference to embodiments of the display driving method,
which will not be repeated.
[0062] Based on the same inventive concept, embodiments of the
present disclosure further provides a display device, comprising
the display driving circuit provided by embodiments of the present
disclosure. The display device can be any product or component with
a display function such as a mobile phone, a panel computer, a
television, a display, a laptop, a digital photoframe, a navigator
etc. Implementations of the display device can make reference to
embodiments of the display driving circuit, which will not be
repeated.
[0063] Apparently, the skilled person in the art can make various
amendments and modifications to the embodiments of the present
disclosure without departing from the spirit and the scope of the
present disclosure. In this way, provided that these amendments and
modifications of the present disclosure belong to the scopes of the
Claims attached and the equivalent technologies thereof, the
present disclosure also intends to encompass these amendments and
modifications.
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